Update usage of EnumerableOwnProperty(Names) in the structured cloning algorithm

[domenic]

https://html.spec.whatwg.org/#structuredserializeinternal step 26.4:

• EnumerableOwnProperties got renamed to EnumerableOwnPropertyNames in Editorial: rename EnumerableOwnProperties to EnumerableOwnPropertyNames tc39/ecma262#1113, so the note referencing it is currently not right.

• But, EnumerableOwnPropertyNames no longer reorders keys arbitrarily, as of Normative: make EnumerableOwnPropertyNames ordered tc39/ecma262#1793! So, I think we can use it directly, replacing step 26.4.1-2 with

Let enumerableKeys be ! EnumerableOwnPropertyNames(value, key).

[AjayPoshak]

I would like to take it up.

[annevk]

@AjayPoshak go for it! (Edit: note you need to be able to sign https://participate.whatwg.org/agreement.)

[AjayPoshak]

I have one concern with agreement on this line

I represent that I do not work in the field of web technologies as an employee, 
contractor, or agent of another person or legal entity, and make this Agreement in my 
personal capacity only.

Does this mean that web developers can't contribute to WHATWG?

[annevk]

It does not, but unfortunately getting it clarified is taking its time: whatwg/sg#67. I think given your employer (per your personal site) you can sign as individual.